Brand: JUMO

JUMO safetyM TB/TW 08 Panel-Mount Temperature Limiter, Type 701170

Name: JUMO safetyM TB/TW 08 Temperature Limiter | Seven Star LLC
Brand: JUMO
SKU: safetyM TB/TW 08

Description

Panel-mounted temperature limiter and monitor for protecting thermal processes

The JUMO safetyM TB/TW 08 (type 701170) is a freely programmable temperature limiter and monitor that sits in a 48 x 96 mm panel cut-out. When the process value passes the set limit, the internal relay, which carries a built-in 3.15 AT fuse cut-out, drops the plant into a safe state, the green OK lamp goes out and the red K1 lamp lights.

The same hardware works as a limiter (TB), which needs a manual Reset press after the process has returned to the valid range, or as a monitor (TW), which resets by itself. A second relay, KV, can announce a pre-alarm before the limit is reached, either as an absolute value or as a distance from the limit. The input is configured for RTD probes, thermocouples, current or voltage signals, so one device type covers many furnace, oven and heating-circuit designs.

Because all configuration lives in software, one stocked unit can be set for a type K thermocouple on a furnace today and a Pt100 on a heating loop tomorrow. Internal and external unlocking, a keypad inhibit and a level inhibit prevent unwanted changes once the limit has been commissioned, and the display can be switched to degrees Fahrenheit.

Technical specifications

Parameter	Specification
Type / standard	701170; temperature limiter/monitor as per DIN EN 14597
RTD inputs	Pt100 and Pt1000 (DIN EN 60751) -200 to +850 °C, accuracy 0.1 %; KTY11-6 PTC -50 to +150 °C, 1 %; 2-wire or 3-wire circuit
Differential option	2 x Pt100 for differential value calculation (no lead compensation)
Thermocouples	L -200 to +900 °C; J -200 to +1200 °C; U -200 to +600 °C; T -200 to +400 °C; K -200 to +1372 °C; N -100 to +1300 °C; S and R 0 to +1768 °C; B 300 to 1820 °C; D 0 to 2495 °C; accuracy 0.4 %; internal Pt100 cold junction, +/-1 K
Current / voltage inputs	0(4) to 20 mA, drop below 2 V, 0.2 %; 0(2) to 10 V, input resistance above 100 kOhm, 0.1 %; free scaling
Detection rate / filter	210 ms (420 ms with double thermocouples); digital filter 2nd order, 0 to 100 s
Relay K1 (limit)	Changeover contact with internal 3.15 AT fuse cut-out; 100,000 operations at AC 230 V, 3 A (0.5 A inductive)
Relay KV (pre-alarm)	Make contact, AC 230 V, 3 A; no contact protection
Analog output (option)	0/4 to 20 mA (load up to 500 Ohm) or 0/2 to 10 V (load at least 500 Ohm); accuracy up to 0.5 %
Binary input	Potential-free contact: reset, keypad inhibit or level inhibit
Supply	AC 110 to 240 V +10 %/-15 %, 48 to 63 Hz, or AC/DC 20 to 30 V, 48 to 63 Hz; below 15 VA
Approvals as printed	DIN CERTCO TW/TB 1219 (DIN EN 14597); UL file 20110523-E325456 (UL 60730-2-9)
Safety data	Overvoltage category III, pollution degree 2; test voltage 3.7 kV, 50 Hz; protection class I with SELV separation
Ambient / storage	0 to +55 °C / -30 to +70 °C; 85 % relative humidity without condensation
Housing	Polycarbonate, UL 94 V0; panel mounting per DIN IEC 61554; cut-out 45 x 92 mm; plug-type screw terminals up to 2.5 mm2
Protection / weight	IP65 at the front, IP20 at the rear; approx. 175 g

Choosing limiter or monitor behavior and the supply version

The device has no fixed personality: limiter or monitor, inverse or direct switching, input type and range are all set in software through the setup interface. The data sheet lists four stock versions with order codes such as 701170/8-0153-1001-25/005.00, which differ in supply voltage and the analog-output extra code. Confirm which supply (110 to 240 V or 20 to 30 V AC/DC) and which analog output you need before ordering.

For DIN-tested installations the data sheet lists matching probes. These are 902006 RTD probes and 901006 thermocouples for air, water and oil. Because the response accuracy is high, the sheet states that thermowells are not admissible with the air-type probes, and that only the supplied thermowells may be used with the weld-in probe types.

Wiring is simple: plug-type screw terminals on the rear, a single binary input for reset or lock functions, and a setup interface on the front for the PC adapter. The data sheet lists three accessory items: the multilingual setup program (70/00548543), a TTL/RS232C PC interface (70/00350260) and a USB/TTL PC interface (70/00456352), plus the external unlocking button RT (70/97097865).

Installation notes and typical uses

Mount the device vertically in a panel with a 45 x 92 mm opening; the IP65 rating applies only at the front, so keep terminals and wiring inside the cabinet. Wire the plug terminals with up to 2.5 mm2 single wire or 1.5 mm2 fine-strand wire with ferrules. For two-wire RTD connections over long leads, the lead resistance can be entered in the extended configuration.

Typical jobs are over-temperature protection of electric heaters, ovens and heat-treatment furnaces, fluid heaters in oil-and-gas skids, and drying and curing lines where a second, independent channel must cut the heating. In hot sites such as Oman, remember the 0 to +55 °C ambient limit when the panel sits in direct sun or a non-air-conditioned shelter.

When specifying the device, remember what the limit relay protects: the data sheet states clearances of at least 6 mm and creepage distances of at least 8 mm between mains, relay and the electronics. Include the delivery scope in the order: the device comes with seal, fastening elements and operating manual B701170.0.

Documents and quotation

This page carries the manufacturer PDF (JUMO safetyM TB/TW 08 data sheet 701170 (EN)) for checking dimensions and order codes. Use the quotation form to name the exact variant, options and delivery address, and we will answer with supply information. See also Temperature Instrumentation for similar instruments.

Datasheets & Documents

Datasheet JUMO safetyM TB/TW 08 data sheet 701170 (EN) Download

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About brand

JUMO is the German maker of temperature sensors, process controllers, pressure transmitters and liquid analysis instruments. Moritz Kurt Juchheim founded it in Fulda in 1948 as M. K. Juchheim KG, making glass thermometers with six employees. The name JUMO comes from the founder's name. It is still a family company headquartered in Fulda, and the parent company has been called JUMO GmbH & Co. KG since 2003.

Seven Star LLC is an independent supplier in Muscat. We list JUMO RTD and thermocouple probes, thermowells, transmitters, controllers, recorders and water analysis instruments, and supply them to process plants, OEMs, HVAC contractors and water utilities in Oman and the GCC by type number.

JUMO company profile

Established	1948, Fulda, Germany, by Moritz Kurt Juchheim
First products	Glass and contact thermometers; platinum glass sensors from 1966
Ownership	Family-owned; renamed JUMO GmbH & Co. KG in 2003
Product families	RTD and thermocouple probes, thermowells, temperature and pressure transmitters, controllers and thermostats, safety temperature limiters, paperless recorders, liquid analysis and flow and level instruments

Milestones

1948: Moritz Kurt Juchheim founds M. K. Juchheim KG in Fulda, making glass thermometers with six employees.
1966: Platinum glass temperature sensors are added.
2003: The parent company is renamed JUMO GmbH & Co. KG.

JUMO products we list

Family	Models	Typical use
RTD and thermocouple probes	902020, 902030, 902050, 902120, 902006 2xPt100, PROCESStemp, mineral-insulated RTD, 901020 thermocouple, 901210, 902810 hygienic, 902550 surface, 902520 HVAC, MarineTemp	Temperature measurement in pipes, vessels, machines, HVAC and food plants
Thermowells and inserts	909710 thermowells, 909740 measuring inserts	Protecting sensors and replacing them without opening the process
Temperature transmitters	dTRANS T01, T03, T04, T05, T06 SIL, T07 HART, T09, T1000 IO-Link, DELOS T switch	Converting sensor signals to 4-20 mA, HART or IO-Link
Pressure and level	dTRANS p20, p30, p31 hygienic, p33 Ex, p02 DELTA, MIDAS S05, MIDAS DP10, DELOS S02, MAERA S25, NESOS R20	Pressure in process, hydraulic and OEM systems; tank and well level
Controllers, limiters and recorders	DICON touch, IMAGO 500, dTRON 316, iTRON, cTRON, diraTRON 104, eTRON T, safetyM STB/STW, safetyM TB/TW, LOGOSCREEN 601, mTRON T	Furnace, oven and process control, over-temperature protection and recording
Liquid analysis and flow	AQUIS touch S, AQUIS touch P, AQUIS 500 pH, AQUIS 500 CR, dTRANS pH 02, pH electrode, digiLine DO, ecoLine NTU, flowTRANS MAG H20, flowTRANS US W01	pH, conductivity, oxygen and turbidity in water treatment; liquid flow

Choosing a temperature sensor starts with the range and accuracy. A Pt100 RTD is accurate and stable from about -200 to 600 °C and is the usual choice in process plants. A thermocouple (type K or J, for example) covers much higher temperatures and responds faster but is less accurate. The wiring also matters: a 3-wire or 4-wire Pt100 connection cancels the resistance of the cable, while a 2-wire connection adds an error that grows with cable length. That is why a head-mounted transmitter is often fitted close to the sensor.

Where JUMO products are used

In Oman and the GCC, JUMO sensors and controllers are used in oil and gas and chemical plants, food and beverage production, plastics and metal heat treatment, HVAC and district cooling, water and wastewater treatment, swimming pools and marine applications.

Ordering JUMO products: what we need

Send the JUMO type number and the full order code from the label (for example 902020/10-...). For probes, add the sensor type (Pt100, Pt1000, type K or J), the number of wires, the insertion length and diameter, and the process connection. For controllers, add the input, outputs and supply voltage.

Facts checked against JUMO's company history, October 2026.

Browse JUMO products by category: Temperature Instrumentation, Pressure Instrumentation, Liquid Analysis Sensors, Controllers & Data Acquisition, Level Transmitter.